/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.catalina.loader;

/**
 * Internal interface that <code>ClassLoader</code> implementations may
 * optionally implement to support the auto-reload functionality of the
 * classloader associated with the context.
 * 
 * @author Craig R. McClanahan
 * @version $Revision: 467222 $ $Date: 2006-10-24 11:17:11 +0800 (星期二, 24 十月
 *          2006) $
 */

public interface Reloader {

	/**
	 * Add a new repository to the set of places this ClassLoader can look for
	 * classes to be loaded.
	 * 
	 * @param repository
	 *            Name of a source of classes to be loaded, such as a directory
	 *            pathname, a JAR file pathname, or a ZIP file pathname
	 * 
	 * @exception IllegalArgumentException
	 *                if the specified repository is invalid or does not exist
	 */
	public void addRepository(String repository);

	/**
	 * Return a String array of the current repositories for this class loader.
	 * If there are no repositories, a zero-length array is returned.
	 */
	public String[] findRepositories();

	/**
	 * Have one or more classes or resources been modified so that a reload is
	 * appropriate?
	 */
	public boolean modified();

}
